class A{
final double PI=3.1215926;
public double getArea (final double r) {
	return PI*r*r;
}
public final void speak() {
	System.out.println("您好，How's everthing here?");
	}
}
public class p125 {
public static void main(String args[]) {
	A a=new A();
	System.out.println("面积："+a.getArea(100));
	a.speak();
}
}
